3rd Edition Coin Chemistry Including Preservation & Cleaning White Book
He also talks about restoration of damaged coins, for example an 1876 CC half dollar that has been holed, probably for jewelry. Since the coin is at least a desirable grade AU-58, he had it restored by an expert, using material from silver coinage. The patch is so good it can only be detected with a high-powered microscope. White provides the contact information for the restorer, and for album purchases.
This book is a Third Edition, dated 2012 , and would be a valuable addition for those who specialize in cleaning and preserving coins, and for novices who would like to know more about the subject.